Style Y (Class B) Input/Output Nac Wiring - Siemens PAD-3 Installation, Operation And Maintenance Manual

2.5.3

Style Y (Class B) Input/Output NAC Wiring

Figure 2-8 shows how to wire for Style Y (Class B) input and output supervision. Use in/out wiring
methods for proper supervision.
Style Y (Class B) Output Notification Circuits
Figure 2-8 shows four, 1.5 amp devices wired as Style Y (Class B) circuits.
Place a 24K ohm EOL resistor (provided) at the end of each loop to enable notification output supervision
when using all outputs as Style Y (Class B) notification circuits. The 24K EOLs must be wired to the
terminals whether or not you are using all output terminals.
Style Y (Class B) Supervised Input Circuits
Figure 2-8 shows Style Y (Class B) supervised wiring from a fire alarm control unit to the PAD-3 board.
Use the control panel's EOL resistor installed as shown to enable notification input supervision.
16-33VDC / VFW
7mA MAX.
SUPERVISED BY
FIRE ALARM CONTROL
UNIT, POWER LIMITED
EOL
(SEE CONTROL UNIT
INSTALLATION
INSTRUCTIONS)
Figure 2-8. Style Y (Class B) Supervised Input/Output Connections
Input 1 Input 2
AC Fail
1 2 3 4 5
6 7
Class B notification
output from fire panel
-
+
Trouble
Relay NAC
10 11 12 13 14
8 9
-
+
-
+
24K 1/2W
PART NO.
140-820405
13
NAC NAC
NAC AUX
15 16 17 18 19 20 21
+
Notification Appliance Circuit
Style Y, Class B
Supervised, Power Limited
See Owner's Manual for
Compatible Devices
Polarity shown in
activated condition.
NAC RATINGS:
ALARM VOLTAGE: 16 -32 VDC
MAX. ALARM CURRENT: 3A
MAX. RIPPLE: 0.1 VAC
MAX. STANDBY CURRENT: 1.0mA
-